RFC 4235, "An INVITE-Initiated Dialog Event Package for the Session Initiation Protocol (SIP)", November 2005

Note: This RFC has been updated by RFC 7463, RFC 8996

Errata ID: 4237
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Xiaofeng Xu
Date Reported: 2015-01-19

Section 4.4 says:

<xs:complexType name="participant">
          <xs:sequence>
            <xs:element name="identity" type="tns:nameaddr"
              minOccurs="0" maxOccurs="1"/>
            <xs:element name="target" minOccurs="0" maxOccurs="1">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="param" minOccurs="0"
                    maxOccurs="unbounded">
                    <xs:complexType>
                      <xs:attribute name="pname" type="xs:string"
                        use="required"/>
                      <xs:attribute name="pval" type="xs:string"
                        use="required"/>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="uri" type="xs:string"
                                           use="required"/>
              </xs:complexType>
            </xs:element>
            <xs:element name="session-description" type="tns:sessd"
              minOccurs="0" maxOccurs="1"/>
            <xs:element name="cseq" type="xs:nonNegativeInteger"
              minOccurs="0" maxOccurs="1"/>
            <xs:any namespace="##other" processContents="lax"
              minOccurs="0" maxOccurs="unbounded"/>
          </xs:sequence>
        </xs:complexType>

It should say:

<xs:complexType name="participant">
          <xs:sequence>
            <xs:element name="identity" type="tns:nameaddr"
              minOccurs="0" maxOccurs="unbounded"/>
            <xs:element name="target" minOccurs="0" maxOccurs="1">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="param" minOccurs="0"
                    maxOccurs="unbounded">
                    <xs:complexType>
                      <xs:attribute name="pname" type="xs:string"
                        use="required"/>
                      <xs:attribute name="pval" type="xs:string"
                        use="required"/>
                    </xs:complexType>
                  </xs:element>
                </xs:sequence>
                <xs:attribute name="uri" type="xs:string"
                                           use="required"/>
              </xs:complexType>
            </xs:element>
            <xs:element name="session-description" type="tns:sessd"
              minOccurs="0" maxOccurs="1"/>
            <xs:element name="cseq" type="xs:nonNegativeInteger"
              minOccurs="0" maxOccurs="1"/>
            <xs:any namespace="##other" processContents="lax"
              minOccurs="0" maxOccurs="unbounded"/>
          </xs:sequence>
        </xs:complexType>

Notes:

The identity element is defined as maxOccurs="1" in the XML schema. However, in the section 4.1.6 of RFC4235, it says "Note that multiple identities (for example a sip: URI and a tel: URI) could be included if they all correspond to the participant". This seems to contradict with the XML schema.

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